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[net-next,v12,07/10] selftest: tun: Test vnet ioctls without device

Message ID 20250530-rss-v12-7-95d8b348de91@daynix.com
State New
Headers show
Series tun: Introduce virtio-net hashing feature | expand

Commit Message

Akihiko Odaki May 30, 2025, 4:50 a.m. UTC 
Ensure that vnet ioctls result in EBADFD when the underlying device is
deleted.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Tested-by: Lei Yang <leiyang@redhat.com>
---
 tools/testing/selftests/net/tun.c | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
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Patch

diff --git a/tools/testing/selftests/net/tun.c b/tools/testing/selftests/net/tun.c
index fa83918b62d1..41747e1728a6 100644
--- a/tools/testing/selftests/net/tun.c
+++ b/tools/testing/selftests/net/tun.c
@@ -12,6 +12,7 @@ 
 #include <linux/if_tun.h>
 #include <linux/netlink.h>
 #include <linux/rtnetlink.h>
+#include <linux/virtio_net.h>
 #include <sys/ioctl.h>
 #include <sys/socket.h>
 
@@ -159,4 +160,42 @@  TEST_F(tun, reattach_close_delete) {
 	EXPECT_EQ(tun_delete(self->ifname), 0);
 }
 
+FIXTURE(tun_deleted)
+{
+	char ifname[IFNAMSIZ];
+	int fd;
+};
+
+FIXTURE_SETUP(tun_deleted)
+{
+	self->ifname[0] = 0;
+	self->fd = tun_alloc(self->ifname);
+	ASSERT_LE(0, self->fd);
+
+	ASSERT_EQ(0, tun_delete(self->ifname))
+		EXPECT_EQ(0, close(self->fd));
+}
+
+FIXTURE_TEARDOWN(tun_deleted)
+{
+	EXPECT_EQ(0, close(self->fd));
+}
+
+TEST_F(tun_deleted, getvnethdrsz)
+{
+	ASSERT_EQ(-1, ioctl(self->fd, TUNGETVNETHDRSZ));
+	EXPECT_EQ(EBADFD, errno);
+}
+
+TEST_F(tun_deleted, getvnethashtypes)
+{
+	uint32_t hash_types;
+	int ret = ioctl(self->fd, TUNGETVNETHASHTYPES, &hash_types);
+
+	if (ret == -1 && errno == EBADFD)
+		SKIP(return, "TUNGETVNETHASHTYPES not supported");
+
+	EXPECT_FALSE(ret);
+}
+
 TEST_HARNESS_MAIN